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7/31/2019 Last Progress Report
1/21
Candidate: Sandeep KumarGuided by: Dr. H. Bhunia
Registration: March 2006IRB : September 2006
7/31/2019 Last Progress Report
2/21
Research ObjectivesResearch objectives
To study the kinetics of photocatalytic degradation of textile dye house effluent.To study the effect of various operating parametersaffecting performance.
Objective studied in last six months
Photocatalytic decolorisation and mineralization of mixed dyes.
7/31/2019 Last Progress Report
3/21
Summary of last presentationOptimization study of Reactive Red 120 decolorisation
by design of experiment approach.
7/31/2019 Last Progress Report
4/21
Work done in last six monthsDevelopment of methodology for analysis of mix dyes.
Adsorption studies of mix dyes.
Adsorption studies of individual dyes in mix dyes.
Catalyst load optimization for mix dyes.
Mineralization studies of mix dyes degradation by
photocatalysis(ongoing).
7/31/2019 Last Progress Report
5/21
Analytical method: Dye conc.
measurement for mix dyesDye conc. measurement for mixed dyes.
Absorbance values were taken at 594nm and 524nm.
RR120 conc.= -0.02232+47.07*Abs.524 - 22.29*Abs.594
RB5 conc.=0.0048-1.36*Abs.524 + 43.75*Abs.594
Total dye conc.= RR12o conc.+ RB5 conc.
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Statistical validation of method
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Adsorption characteristics of mix dyes Adsorption characteristics of mix dyes
(RR120 and RB5)
0
5
10
15
20
25
30
35
40
4550
0 10 20 30 40 50 60 70 80 90 100
q ( m
g / g )
Ce (mg/l)
7/31/2019 Last Progress Report
8/21
Adsorption characteristics of mix dyes
0, 00
5
10
15
20
25
30
35
40
0 5 10 15 20 25 30 35 40 45
q ( m
g / g )
Ce (mg/l)
RR120
7/31/2019 Last Progress Report
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Adsorption characteristics of mix dyes
0, 00
2
4
6
8
10
12
14
16
0 10 20 30 40 50 60
q ( m
g / g )
Ce (mg/l)
RB5
7/31/2019 Last Progress Report
10/21
Adsorption isotherms y = 0.0172x + 0.2065
R = 0.9959
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
0 10 20 30 40 50 60 70 80 90 100
C e / q e
Ce (mg/l)
Langmuir isotherm for total dye adsorption in dye mix
7/31/2019 Last Progress Report
11/21
Adsorption isotherms
y = 0.0233x + 0.0225
R = 0.9991
0
0.2
0.4
0.6
0.8
1
1.2
0 5 10 15 20 25 30 35 40 45
C e / q e
Ce (mg/l)
Langmuir isotherm for RR120 in mix dye
7/31/2019 Last Progress Report
12/21
Adsorption isotherms
y = 0.3872x - 8.4777R = 0.832
0
2
4
6
8
10
12
14
0 10 20 30 40 50 60
C e / q e
Ce (mg/l)
Langmuir isotherm for RB5 dye in dye mix
7/31/2019 Last Progress Report
13/21
Adsorption isotherms
y = -1.5212x + 3.2504
R = 0.8296
0.5
0.6
0.7
0.8
0.9
1
1.1
1.2
1.3
1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8
l o g q
log Ce
Freundlich isotherm for RB5 in dye mix
7/31/2019 Last Progress Report
14/21
Decolorisation of dyes mix
0
10
20
30
40
50
60
-40 -30 -20 -10 0 10 20 30 40 50 60 70
D y e c o n c .
( m g /
l )
Time (minute)
RB5
RR120
7/31/2019 Last Progress Report
15/21
Decolorisation of dyes mix
0
10
20
30
40
50
60
-40 -30 -20 -10 0 10 20 30 40 50 60 70
D y e c o n c .
( m g /
l )
Time (minute)
RB5
RR120
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16/21
Decolorisation of dyes mix
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Decolorisation of dyes mix
0
10
20
30
40
50
60
-40 -30 -20 -10 0 10 20 30 40 50 60 70
D y e c o n c .
( m g /
l )
Time (minute)
RB5
RR120
7/31/2019 Last Progress Report
18/21
Decolorisation of dyes mix with
different catalyst loading
0
20
40
60
80
100
120
-40 -30 -20 -10 0 10 20 30 40 50 60 70
0.25 g/l 0.5 g/l 0.75 g/l 1.0 g/l 1.25 g/l 1.5 g/l 2.0 g/l
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Pseudo first order decolorisation kineticsy = 0.0056x
R = 0.94
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0 10 20 30 40 50 60 70
- l n
( C / C o
)
Time (minute)
7/31/2019 Last Progress Report
20/21
Catalyst load optimization
0
0.005
0.01
0.015
0.02
0.025
0 0.2 0.4 0.6 0.8 1 1.2
k a p p
( m i n u
t e )
Catalyst load (g/l)
Optimum catalyst load for RR120 and RB5 mix dye
7/31/2019 Last Progress Report
21/21
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